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Trigonometry sec of 15, cos 15, sin 15, exact values?

Trigonometry sec of 15, cos 15, sin 15, exact values?

asked Apr 7, 2016 in TRIGONOMETRY by anonymous
edited Apr 7, 2016

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1 Answer

Step :1

The trigonometric values are .

Find

Let .

The trigonometric difference formula is .

Substitute and in the trigonometric formula.

By using trigonometric table values.

.

Step :2

Find

Let .

The trigonometric difference formula is .

Substitute and in the trigonometric formula.

By using trigonometric table values.

.

Step :3

Find

.

The exact values of trigonometric identities are , and .

Solution :

The exact values of trigonometric identities are , and .

answered Apr 9, 2016 by lilly Expert
edited Apr 9, 2016 by lilly

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