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Tan70=tan(90-20)=cot20=1/tan20
similarly tan50=1/tan40
hence -3tan45.tan20.tan40.tan50.tan70/5
=>-3(1)(tan20)(tan40((1/tan40)(1/tan20)/5
=>-3/5
.
hope this helps you
.
keep smiling
.
mark this as brainliest answer
similarly tan50=1/tan40
hence -3tan45.tan20.tan40.tan50.tan70/5
=>-3(1)(tan20)(tan40((1/tan40)(1/tan20)/5
=>-3/5
.
hope this helps you
.
keep smiling
.
mark this as brainliest answer
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