please help me out working of these questions
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1. ans is -sin90=-1
2. ans is -cos90=0
3. ans is -sec theta
4. ans is sec 90 = infinity
2. ans is -cos90=0
3. ans is -sec theta
4. ans is sec 90 = infinity
sweetylyceum135:
thanks for answering .but i need explanation orelse send pics
in your answer
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i hope this will usful to u
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And please will you explain me ....3 rd sum
cosec A = 1/sinA
cosec (270+θ) = 1/ sin(270+θ)
is it cleat
clear
270+θ belongs to 4th quadrant
in 4th quadrant cos and sec or +ve and sin becomes cos
sin(270+θ)=-cos θ
1/-cosθ=-secθ
thankyou sir
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