Welcome :: Homework Help and Answers :: Mathskey.com

Q&A
Unanswered
Categories
Users
Ask a Question

Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

Q&A Categories
BASIC MATH (93)
PRE-ALGEBRA (441)
ALGEBRA 1 (2,220)
GEOMETRY (864)
ALGEBRA 2 (2,751)
TRIGONOMETRY (1,187)
PRECALCULUS (1,903)
CALCULUS (2,802)
STATISTICS (129)
PHYSICS (659)
CHEMISTRY (137)
MECHANICAL ENGINEERING (64)
ELECTRICAL ENGINEERING (207)
Winplot Tutorials (2)

Most popular tags

solving-equations system-of-equations functions math slope-intercept-form physics homework-help trigonometric-identities integration limits substitution-method calculus

13,459 questions

17,854 answers

1,446 comments

811,087 users

Can someone please help me with a calculus problem?

+2 votes

Evaluate the limit using L'Hopital's rule: lim 9cos(-7x)sec(-5x) when x approaches x/2

(Please show work so I can understand.)

limits

asked Feb 7, 2013 in CALCULUS by angel12 Scholar

Share this question

Google+ Facebook Twitter LinkedIn Reddit

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

+2 votes

Reciprocal identities: sec(θ) = [1 / cos(θ)]

Even-Odd Identities: cos(-θ) = cosθ and sec(-θ) = secθ

L'Hopital's Rule:

Derivative of Trigonometric Functions:

answered Feb 7, 2013 by britally Apprentice

Please log in or register to add a comment.

Related questions

Can someone please help me with this mathematical problem?

asked Jul 21, 2013 in TRIGONOMETRY by anonymous Apprentice

-inverse-function

Can someone help me out with some calculus:

asked Nov 12, 2014 in CALCULUS by anonymous

definite-integral

Can someone help me with a Trig problem?

asked Jan 17, 2013 in TRIGONOMETRY by anonymous Apprentice

trigonometric-equation

Can someone help me with a Trig problem?

asked Jan 17, 2013 in TRIGONOMETRY by anonymous Apprentice

trigonometric-equation

Can someone help me with this Physics problem?

asked Dec 12, 2014 in PHYSICS by anonymous

speed

Can someone help me with this problem involving kinetic and potential energy?

asked Feb 3, 2013 in PHYSICS by anonymous Apprentice

work-energy-theorem

Can someone help me with a calc integral substitution.?

asked Feb 13, 2015 in CALCULUS by anonymous

integration
substitution

can someone please help me with this pre calc worksheet?!!?!?

asked Apr 13, 2016 in PRECALCULUS by anonymous

homework-help
pre
#pre-calc
#calculus
#help-me

Can someone please help me with my math homework ?

asked May 24, 2014 in ALGEBRA 1 by anonymous

solving-equations

Can someone please help me with this ONE algebra question ?

asked Apr 27, 2013 in ALGEBRA 2 by andrew Scholar

focal-length

Calculus about volume of sphere rate of change can someone help me?

asked Dec 29, 2012 in CALCULUS by linda Scholar

derivative
volume

Could you please help me with this calculus problem?

asked Nov 18, 2014 in CALCULUS by anonymous

implicit-differntiation

Need help with a limit problem?

asked Apr 16, 2013 in CALCULUS by chrisgirl Apprentice

limits

Can someone please show me how to do this problem?

asked Mar 31, 2013 in TRIGONOMETRY by andrew Scholar

product-rule

Can someone help me with this??

asked Oct 21, 2014 in CALCULUS by anonymous

critical-points

can someone help me please :(

asked Nov 25, 2014 in CALCULUS by anonymous

exponential
functions

can someone help me please!

asked Oct 22, 2014 in CALCULUS by anonymous

math20-1

can someone help me! please!

asked Oct 22, 2014 in CALCULUS by anonymous

calculus
math20

Can someone please help me figure these out?

asked Nov 13, 2013 in CALCULUS by andrew Scholar

derivative
functions

Can someone please help me

asked Feb 7, 2013 in CALCULUS by angel12 Scholar

derivative

Copyright © 2024 MATHSKEY. All Rights Reserved. Sitemap|Terms Of Use|Disclaimer|Contact Us|FAQ

...