9 x {[14/2+(4-1)]-8}
1 answer:
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The answers are given below:
<h3>What is Trigonometry?</h3>Trigonometry is a branch of mathematics that studies relationships between the sides and angles of triangles.
1. (cos x. cos y)(tan x + tan y) = sin (x+ y)
(cos x. cos y)(tan x + tan y)
= cos x. cos y (sinx/ cos x + sin y/ cos y)
= sin x cos y + sin y cos x
= sin (x+ y) [ sin ( x +y)]= sin x cos y + sin y cos x
= RHS
3.
Using identity
cos ² x=0
Applying then x=0
So, cos x =0
General solution will be .
Learn more about trigonometry here:
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