tan(90-a) × cot a- sec(90-a) × cosec a + √3tan 12 × tan 60 × tan78
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danishjibran:
You understood?
yes
can u plz solve this without using trigonometric tables
How can i solve now I don’t know
i mean i can solve but how should i send
can u just tell me in the comments only..plz
We have to use tan60 = root 3
without that we cannot solve
Or else we have to leave the answer in terms of tan only
thank you
Answered by
2
Question..
tan(90-a)×cota-sec(90-a)×coseca+√3tan12×tan60×tan78
=cota.cota-coseca.coseca+√3tan(90-78)×tan60×tan78
=cot²a-cosec²a+√3cot78×√3×tan78
=cot²a-cosec²a+√3.1/tan78×√3×tan78
=-(-cot²a+cosec²a-3)
=-(1-3)
=-(-2)
=2
this is your answer
can u plz solve without using trigonometric tables
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