Evaluate cos 40°cosec 50° + sin 50° sec 40°
Answers
Answered by
1
Step-by-step explanation:
cos40°.cosec50° + sin50°.sec40°
=cos40°.sec(90°-50°)+cos(90°-50°).sec40°
=cos40°.sec40°+cos40°.sec40°
=(cos40°/cos40°)+(cos40°/cos40°)
=(1)+(1)
=2
Answered by
0
Answer:
ANS is 2.
Step-by-step explanation:
cos40.cosec50+sin50.sec40
= cos40.cosec(90-40)+sin50.sec(90-50)
[
we know the formula,
sec(90-x)=cosecx;
cosec(90-x)=secx;
also
sinx.cosecx=1;
cosx.secx=1;
]
= cos40.sec40+sin50.cosec50
= 1+1
=2.
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