- #1
garytse86
- 311
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I am currently learning how to simplify trig functions, but is there a way to know which formulae to use?
In my textbook there are three formulae:
cos^2ttheta + sin^2theta = 1
1 + tan^2theta = sec^2theta
cot^2theta + 1 = cosec^2theta
I am also stuck in this question:
prove this identity:
cosA / (1 - tanA) + sinA / (1 - cotA) = Sin A + cosA
Since this requires a proof I need to work on the LHS and RHS separately. Can someone help me start this question? I really appreciate your help.
In my textbook there are three formulae:
cos^2ttheta + sin^2theta = 1
1 + tan^2theta = sec^2theta
cot^2theta + 1 = cosec^2theta
I am also stuck in this question:
prove this identity:
cosA / (1 - tanA) + sinA / (1 - cotA) = Sin A + cosA
Since this requires a proof I need to work on the LHS and RHS separately. Can someone help me start this question? I really appreciate your help.